Search results

Introduction Metal corrosion under sea water environment is dependent upon not only the external environmental factors such as the temperature, chloride ion concentration, dissolved oxygen, and pH of the sea water but also other various factors such as the passivation characteristics and corrosion resistance depending on the chemical composition of the exposed material, the shape of the product, and type of the motion.
It also determines the microstructure and property of aluminum bronze depending on the content in the solid solution.
Hence, despite being the same material, the damage on the part affected by cavitation can be dependent on the galvanic corrosion damage effect to a certain extent, when forming micro galvanic cell on both the part that is affected by cavitation and the part that is not.
The types can be determined by the effect of synergism that is elevated simultaneously due to the material characteristics and the environmental factors [12-13].
Conclusion We investigated the corrosion resistance under cavitation and the electrochemically complicated environment of the ALBC3 that has excellent corrosion resistance and mechanical properties in sea water environment.

Although the research and application of scaffold materials for tendon tissue engineering has achieved some success, but the application materials or the presence of biocompatibility, degradation problems or have poor mechanical properties, machining molding defects, there is still a big gap between the ideal scaffold materials.
The research shows that, polyethylene fiber polylactic acid composite material has good biological properties, can be used for clinical tendon repair.
The ankle in extreme dorsiflexion, Achilles tendon subjected to up to 6867 N force, so that movement in the special movement and stress is an important factor to the Achilles tendon rupture.
Although the research and application of scaffold materials for tendon tissue engineering has achieved some success, the application materials or the presence of biocompatibility, degradation, or the presence of poor mechanical properties, machining molding defects, but also there is a big gap with the ideal scaffold material.
The release of the 3D geometry and support tensile strength, support irregular for bioactive substance, are also important factors to be considered in the design of.

Abstract: The complex nonlinear problem exists between the factors which influence the strength of hybrid fiber reinforced concrete.
Polypropylene has the performance of heat resistance, chemical corrosion resistance, electrical insulation, light quality, excellent mechanical properties, low cost, simple technics, though polypropylene cannot be used as structural reinforced material, the mixed polypropylene can effectively improve the crack resistance, toughness, permeability resistance, durability and fatigue resistance of concrete.
Due to the strength of the composites is influenced by various factors, linear function does not apply considering the nonlinear characteristics of all the factors and hybrid fiber concrete strength.
(2) RBF neural network function based on k-means clustering, in which Overlap coefficient and ClusterNum of hidden layer nodes are the main parameters that affecting the network performance.
The above six factors are chose as input layer nodes in modeling, compressive strength and breaking strength are respectively chose as two RBF network output layer nodes.

Among them, the factor that affects the maximum bonding strength of the material is the diameter of the cast steel shot.
Preparation and Tribological Properties of PES/Metal Self-lubricating Composite Materials[D].
Effect of Silane-modified Coconut Shell Powder on Surface Properties of Thermoplastic Elastomers and Its Application[J].
Press-sintering Forming and Properties of Metal Plastics Composites[J].
The effect of the ocean water immersion and UV ageing on the dynamic mechanical properties of the PPS/glass fiber composites[J].

At present, the structure of the aerodynamic measures by wind resistance, structural measures and measures to improve the mechanical, aerodynamic measures were used without changing the bridge structure and properties of the bridge under the premise of changing the shape of an appropriate arrangement or increase the number of diversion devices, such as the installation of nozzle, plate, stabilizer, etc.
Specification by the wind we can see into the bridge operating in the state, Stiffening girder design basis wind speed (1) Specification by the wind to know the main beam flutter wind speed is determined by testing (2) Where:K - consider the wind tunnel test and design errors, construction of uncertainty factor of safety, K = 1.2 μf - consider the fluctuation of wind speed and level of correlation of dimensionless correction factor.
Truss width increase is a more effective measures to improve the suspension bridge wind resistance, but the increase will not only greatly improved truss wide cost, and the suspension bridge would adversely affect the overall landscape effect.
Set to increase cross-cable suspension bridge oblique wind resistance of the measures, although relatively new practice, but the effect is not very good, also the overall landscape effect on the suspension bridge adversely affect.
Use of space cable, cable length and the girder through the top width of the size of the calculated comparison, the top cable from the 1m, 14m boom width at the time to reach the best results, do not only improve the bridges wind resistance, without affecting the cost, but also improve the landscape effect, the other, the use of space or the first main cable in China, such practices on the design and construction of suspension bridge technology also played a certain role.

We examined the safety after compared the four materials of SM45C used before, through structural analysis Fig. 1 Real appearance of using freight skate Skate is comprised of the Main Frame, Sub Frame, Roll, and Pin, analysis is performed on the cargo load weight affecting the Main Frame directly.
Compared that you want to replace the existing Main Frame with material SM45C, AA6061, AA7075, GFRP, CFRP for light weight of material, the result of each material and ensure safety and structural properties were examined in accordance with the light weight rate.
Table 1 shows the material property for each used in the analysis.
The SM45C and AA7075 are isotropic material, whereas CFRP, GFRP material are orthotropic analysis, which were performed by applying the orthotropic properties.
Lee, Impact Analysis on Energy Efficiency of Road Freight Transport Industry by Various Socio-economic Factors, KLR, Vol.21 (2011) 59-84

Furthermore, with non-brush pressure reduction, the system boasts a fairly low speed and the mechanical properties of being hard.
Non-linear factors are less and parameters can be easily set.
Installing the grating ruler on the actuators workbench and constituting the full closed-loop position servo system, the possible clearance of mechanical transmission chain, friction, stiffness and other nonlinear factors affect the stability of the motor run [1].
At the same time, the position loop within the object properties of nonlinear and many disturbance factors so the position regulator should have strong robustness.
Mechanical industry publishing house, 1999

The chemical composition and mechanical properties of TMCP steel used are shown in Tables 1 and 2 respectively.
It has been recognized that the fatigue strength of steel in a corrosion environment is significantly affected by the fatigue loading speed.
In addition, it is known that the sea wave period is 6~10cpm Table 1 Mechanical properties of TMCP steel Table 2 Chemical composition of TMCP steel Plate used plate used Fig. 1 Shape of CCT fatigue test specimen Fig. 2 Shape of CT fatigue test specimen [2], accordingly in this research, the loading speed of fatigue test was set at 10cpm which may be equivalent to the sea wave period.
That means that other factors, for example, the formation of the rust, electrocoating, stress concentration of the pit at 11 01 0 0 ∆K (MPa m ) 10-9 10-8 10-7 10-6 10-5 da/dN (m/cycle) 1/2.
Fujimoto: Journal of The Society of Naval Architects of Japan, Vol.142 (1977), pp.239-250 [4] Stress Intensity Factors Handbook, Vol. 1, Pergamon Press (1987) [5] T.L.

The application pressure of the sleeve repair affects the amount of stress reduction in the pipe and the amount of crack growth experienced.
Two possible methods of repair of SCC affected pipelines were validated by this work.
If the crack growth over the period of X days is:- ∑∆= 1 X n iCA σ (1) then the average stress range is: - CX A n average 1 )( ) 1 ( =∆σ (2) The linear coefficient "C" can be omitted without affecting this calculation.
The crack growth predictions in Table 1 have not included several important factors such as the actual crack shape, angle to the surface, and the proximity and spacing of other cracks.
Calculations based on mean properties in BS7910 and the measured crack sizes over-predicted the crack growth for the bare pipe by an average of 57% (figure 7).

Using nanoindentation to measure material mechanical properties has been a pioneering application of nanotechnology in materials science and engineering.
Cement-based materials' local mechanical properties can now be measured at the nanoscale with nanoindentation [11], and researchers have recently used a "Triboindenter".
Many properties of cement, including as mechanical and transport properties, creep, and shrinkage, need a thorough understanding of the interplay of cement phases with water.
Formation and properties of C–S–H–PEG nano-structures.
Small but strong: a review of the mechanical properties of carbon nanotube-polymer composites.